Are Garbage Disposals Safe to Use with a Septic System?

This guide by Septic Blue of Tampa covers everything you need to know about garbage disposals and septic systems. Remember, we are the experts to call when you need dependable septic service.

The Problem with Excess Food Waste

Many homeowners assume that because food is biodegradable, it won't hurt the septic system. Unfortunately, that's not always true. Large amounts of food waste increase the workload for the beneficial bacteria inside the septic tank. While these bacteria break down organic matter, they can only process so much at a time. Excessive food waste can overwhelm the natural treatment process, allowing more solids to accumulate and potentially reach the drain field. Once solids enter the drain field, repairs become significantly more expensive. You’ll need to schedule more frequent septic pumping and inspections to keep your septic system running smoothly.

Avoid Problematic Foods

Garbage disposals are designed to handle small, soft food scraps like vegetable scraps and meat pieces—not everything that comes off your plate. Never treat your garbage disposal as a rinse aid. This is a common mistake we see among homeowners, and it’s a leading cause of septic failure. Certain foods and materials are not only known to clog drains, but they can also cause a septic tank to fill up much faster and disrupt the bacteria balance in the tank. Here is a list of foods that don’t belong in your septic system:

• Fats, oils, and grease
• Pasta, rice, potato peels, and oatmeal
• Fibrous foods
• Eggshells
• Hard objects
• Coffee grounds
• Animal bones, shellfish, and fruit pits

Always Run Cold Water

Run a strong cold-water flow before, during, and after using your garbage disposal. Cold water solidifies fats and oils so that they can drain away into the septic system without causing clogging. Hot water is not advisable as it can cause these substances to liquefy and then re-solidify further down the drain.

Regular Septic Maintenance Becomes Even More Important

Homes with garbage disposals generally require closer attention to septic maintenance. Because more solids enter the tank, inspections and septic cleaning are needed more frequently than in homes that don't use a disposal. Following your septic professional's maintenance schedule helps prevent sludge from building up to dangerous levels. Routine inspections can also identify developing problems before they become major repairs. Work with a reliable septic company to come up with an effective maintenance plan for your septic system.